Hi Modelgunfan.I can certainly help you if you wish. PM me.
Also Richard Jones (on the Forum) most likely has a replacement for the part you photographed.
It's actually the firing bolt which on my models was warped (see my Luger P08 repair posts for details).
Richard is most helpful.
You may also need some parts for the toggle mechanism, which he will also have in stock.
The "C" hooks on the lever bar (inside the grip) are prone to breaking easily; and the whole of the main spring mechanism(also in the grip) can sometimes deform. I'm actually rebuilding one of my P08 Lugers over the Christmas period and will post do photos ---if it works!
But email me and once we know what other parts you might need, contact Richard.
If there's part's you need but he doesn't have, I can possibly help you make them yourself if need be.
Have a good Christmas.
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Kiwigunner